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Nonlinear Effect of Deadtime in Small-Signal Modeling of Power-Electronics System Under Low Load Conditions

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Nonlinear Effect of Deadtime in Small-Signal Modeling of Power-Electronics System Under Low Load Conditions. / Berg, Matias; Roinila, Tomi.

julkaisussa: IEEE Journal of Emerging and Selected Topics in Power Electronics, 2020.

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Berg, Matias ; Roinila, Tomi. / Nonlinear Effect of Deadtime in Small-Signal Modeling of Power-Electronics System Under Low Load Conditions. Julkaisussa: IEEE Journal of Emerging and Selected Topics in Power Electronics. 2020.

Bibtex - Lataa

@article{b7389b0562a3414bab42ffe227acf49d,
title = "Nonlinear Effect of Deadtime in Small-Signal Modeling of Power-Electronics System Under Low Load Conditions",
abstract = "Deadtime is required to ensure that switches of a synchronous switching inverter leg never conduct at the same time. During deadtime, the current commutates to an anti-parallel diode that can cause a voltage error depending on the instantaneous current direction. To measure a frequency response from a system, external injections are commonly required to perturb the system. The perturbation can change the current direction at the frequency of the injection causing a voltage error at injection frequency due to the deadtime. The error depends on the perturbation amplitude, inductor current ripple and the fundamental current amplitude. This paper proposes a describing-function method to model the deadtime effect under low load conditions. It is shown that a nonlinear damping effect from the deadtime can occur under low load conditions and cannot be modeled with a resistor-like element. Real-time hardware-in-the-loop-simulation results are presented and used to demonstrate the effectiveness of the proposed method. Experimental measurements are used to verify the nonlinear deadtime effect.",
author = "Matias Berg and Tomi Roinila",
note = "Vaihda AM kustantajan versioon, kun lopullinen IEEE:ss{\"a}. 30.9.2020 EJ",
year = "2020",
doi = "10.1109/JESTPE.2020.2967341",
language = "English",
journal = "IEEE Journal of Emerging and Selected Topics in Power Electronics",
issn = "2168-6777",
publisher = "Institute of Electrical and Electronics Engineers Inc.",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Nonlinear Effect of Deadtime in Small-Signal Modeling of Power-Electronics System Under Low Load Conditions

AU - Berg, Matias

AU - Roinila, Tomi

N1 - Vaihda AM kustantajan versioon, kun lopullinen IEEE:ssä. 30.9.2020 EJ

PY - 2020

Y1 - 2020

N2 - Deadtime is required to ensure that switches of a synchronous switching inverter leg never conduct at the same time. During deadtime, the current commutates to an anti-parallel diode that can cause a voltage error depending on the instantaneous current direction. To measure a frequency response from a system, external injections are commonly required to perturb the system. The perturbation can change the current direction at the frequency of the injection causing a voltage error at injection frequency due to the deadtime. The error depends on the perturbation amplitude, inductor current ripple and the fundamental current amplitude. This paper proposes a describing-function method to model the deadtime effect under low load conditions. It is shown that a nonlinear damping effect from the deadtime can occur under low load conditions and cannot be modeled with a resistor-like element. Real-time hardware-in-the-loop-simulation results are presented and used to demonstrate the effectiveness of the proposed method. Experimental measurements are used to verify the nonlinear deadtime effect.

AB - Deadtime is required to ensure that switches of a synchronous switching inverter leg never conduct at the same time. During deadtime, the current commutates to an anti-parallel diode that can cause a voltage error depending on the instantaneous current direction. To measure a frequency response from a system, external injections are commonly required to perturb the system. The perturbation can change the current direction at the frequency of the injection causing a voltage error at injection frequency due to the deadtime. The error depends on the perturbation amplitude, inductor current ripple and the fundamental current amplitude. This paper proposes a describing-function method to model the deadtime effect under low load conditions. It is shown that a nonlinear damping effect from the deadtime can occur under low load conditions and cannot be modeled with a resistor-like element. Real-time hardware-in-the-loop-simulation results are presented and used to demonstrate the effectiveness of the proposed method. Experimental measurements are used to verify the nonlinear deadtime effect.

U2 - 10.1109/JESTPE.2020.2967341

DO - 10.1109/JESTPE.2020.2967341

M3 - Article

JO - IEEE Journal of Emerging and Selected Topics in Power Electronics

JF - IEEE Journal of Emerging and Selected Topics in Power Electronics

SN - 2168-6777

ER -